From sightings on ADS-B, it appears resident MC-130J 13-5786 has departed Mildenhall to the 1st SOS 353rd SOG Kadena AB as SAKE30, and replacement MC-130J 14-5805 has arrived at Mildenhall early on the 26th September as COMFY41.
Edit, This serial has, I'm informed been confirmed by Mk.1 eyeball.14-5805, that is.